norm_args.h revision 848b8605 
1
2/*
3 * Mesa 3-D graphics library
4 *
5 * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26/*
27 * Normal transform function interface for assembly code.  Simply define
28 * FRAME_OFFSET to the number of bytes pushed onto the stack before
29 * using the ARG_* argument macros.
30 *
31 * Gareth Hughes
32 */
33
34#ifndef __NORM_ARGS_H__
35#define __NORM_ARGS_H__
36
37/* Offsets for normal_func arguments
38 *
39 * typedef void (*normal_func)( const GLmatrix *mat,
40 *                              GLfloat scale,
41 *                              const GLvector4f *in,
42 *                              const GLfloat lengths[],
43 *                              GLvector4f *dest );
44 */
45#define OFFSET_MAT	4
46#define OFFSET_SCALE	8
47#define OFFSET_IN	12
48#define OFFSET_LENGTHS	16
49#define OFFSET_DEST	20
50
51#define ARG_MAT         REGOFF(FRAME_OFFSET+OFFSET_MAT, ESP)
52#define ARG_SCALE       REGOFF(FRAME_OFFSET+OFFSET_SCALE, ESP)
53#define ARG_IN          REGOFF(FRAME_OFFSET+OFFSET_IN, ESP)
54#define ARG_LENGTHS     REGOFF(FRAME_OFFSET+OFFSET_LENGTHS, ESP)
55#define ARG_DEST        REGOFF(FRAME_OFFSET+OFFSET_DEST, ESP)
56
57#endif
58